Metal sash or frame



L. S. LAC'HMAN- METAL SASH 0R FRAME.

APPLICATION FILED SEPT. 12. 1914.

1 ,308,428. Patented July 1, 1919.

WITNESSES 260/ INVENTOR L Lawrence allacivmam By UNITED STATES PATENTOFFICE.

I LAURENCE S. "LACHMAN OF NEW YORK, N. Y., ASSIGNOR T0 UNIVERSALELECTRIC WELDING COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

METAL SASH OR FRAME.

To all whom it may concern:

Be it known that I, LAURENCE S. LACK- MAN, a citizen of the UnitedStates, and a resident of New York, in the county of New York and Stateof New York, have invented certain new and useful Improvements in MetalSashes or Frames, of which the following is a specification.

My present invention relates to frame or sash construction andparticularly to the construction of joint for securing and look ing themembers at their intersections.

The invention is particularly useful in the construction of metal windowframes but its utility is of wide scope and applicable to any suitablemetal framework or similar construction.

The object of the invention is to provide a simple and efficient meansfor joining the intersecting members of the structure.

The invention consists in the improved construction hereinafter moreparticularly described and then specified in the claim.

g In the accompanying drawings:

Fi re 1 is a plan view of two intersecting mem rs prior to being lockedtogether.

Fig. 2 is a transverse section of one of 1 the members taken on the line2-2 of Fi 3 illustrates the two intersecting mem ers of a frame togetherwith the looking button arranged one above the other in the relation inwhich they are assembled, parts being shown in cross-section.

Fig. 4 1sa plan view of the completed joint.

Fig. 5 is a plan view of a slightly modified form of intersectingmembers after being joined together. i

Fig. 6 is a cross-section through a modified form of locking button orplate.

Fig. 7 is a side elevation of a button which might be employed with theform of intersecting members shown in Figs. 1 and 4.

In the drawings, 1 and 2 indicate two intersectin metallic stripstypifying two of the mom rs of a sash, frame, partition or otherstructure to which the invention is applicalble. Each of the strips isT-shaped in cross-section whereby each strip has two angles in which theedges of a pane of glass or panel is secured. Each strip is providedwith a longitudinal ridge or rib 3 preferably extending the lengththereof midway between the edges 0 the flanges. 'The ridge Specificationof Letters Patent.

Patented July 1, 1919.

Application filed September 12, 1914. Serial No. 861,348.

or rib 3 is preferably rolled on the strip at the time of its originalformation or it may be otherwise formed.

The flanges of each strip are mitered out as at 4 from the edge of theflange to the web at each desired point of intersection. The webs of themembers 1 and 2 are also slotted in line with the apex of the miteredportion, the member 1 being provided with a slot 5 entering from thelower edge of the web and of a width equal to the thickness of the webwhile the web 'of the member 2 is provided with a similar slot 6entering from the to of the web, the slots 5 and 6 being of su cientdepth that when the members 1 and 2 are placed crossing each other withthe slots in line they can be inter-meshed until the fianges of themembers lie in the same plane. When so placed the miters 4: engage andthe joint appears as shown in Fig. 1.

The two members 1 and 2 after being placed in the position shown in Fig.1 are locked together by a metallic button or connector 7 of any desiredform. The button 7 is provided with a depending projection orprojections preferably in the form of a circular ridge 8 stamped orotherwise provided on the under surface of the button. The button 7 isplaced centrally over the intersection of the strips, the ridge 8resting up and intgrsecting the ridges 3 of the members 1 an 2.

The parts are held in this position. between the electrodesof a suitableelectric welding machine and electric current is passed from oneelectrode to the other through the button 7 and members 1 and 2 while atthe same time pressure is applied. As the current passes through theparts from one electrode to the other the points of isolated contact,formed by the intersections of the ridge 8 and ridges or ribs 3, softenand on the application of pressure, preferably through the electrodes,such points coalesce with each other and weld the button to theintersecting members. The electric welding process being well known inthe art and universally practised further description of its use inconnection with this invention is deemed unnecessary.

In the manner of joining the members shown in Figs. 1 to 4, the freeedge 9 of the button 7 bears on the top of the ridge 3 after thecompletion of the welding operation whereby a space exists between theunout as at 20, (Fig. 7) to allow it to span the ridges 3 in which formit could be used with the intersecting members shown in Figs. 1 and 4 orinstead of forming a continuous ridge on the strips 1 and 2, short ribsor projections 11 might be fonned in which case the entire weldingprojections would be incased by employing the form of button shown inFig. 6.

It will be understood that the invention is not limited to the detailsof the formation of the parts as herein shown except as may be expressedin the appended claim.

'What I claim as my invention is:

A metallic sash or frame comprising T- shaped intersecting membersarranged with the flanges of said members in the same plane, ridgesrising from the top of said members, a button provided withweldingprojections superimposed over the intersection of said members andwelded thereto by said projections and ridges and a depending flange onthe edge of said button adapted to bear against the flanges of saidmembers.

Signed at New York in the county of New York and State of New York this11th day of September, A. D. 191a.

LAURENCE S. LACHMA N.

WVitnesses:

F. G. TowNsEND, HENRY A. Guns.

